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Species Globotruncana arca Cushman 1926


Discussion / Comments:
Caron (1985):
The two keels arc separated by a large imperforate peripheral band. The periumbilical rim is well marked. G. area differs from G. falsostuarti in the presence of two widely separated keels, present throughout the last whorl.
Van Eijden & Smit (1991):
Remarks. Forms intermediate between this species and G. rugosa (Marie, 1941) occur. Its local range is paleoenvironmentally controlled, and elsewhere it ranges from the Santonian to the middle Maestrichtian. We found it in the middle and also the upper Maestrichtian.
Systematics:

5
 Classis Foraminifera
  Familia Globotruncanidae
   Genus Globotruncana
    Species Globotruncana arca
Synonym list:
Caron (1985):
1926 Pulvinulina arca Cushman. - Cushman : p.23 pl 3 figs 1a-c
1964 Globotruncana churchi Martin. - Martin : p.79 pl 9 fig 5
1985 Globotruncana arca Cushman. - Caron : 52, 53 figs 19.5-8
Van Eijden & Smit (1991):
1926 Pulvinulina arca Cushman. - Cushman : p.23 pl. 3, figs. 1a-c
1991 Globotruncana arca Cushman. - Van Eijden & Smit : p.107
References:

Cushman,J.A. (1926):
Some foraminifera from the Mendez Shale of Eastern Mexico . Contributions from the Cushman Foundation for Foraminiferal Research Vol. 2 p. 16-28

Martin,L. (1964):
Upper Cretaceous and Lower Tertiary foraminifera from Fresno County. , Jahrbuch der Geologischen Bundesanstalt - Sonderbände Vol. 9 p. 1-128

Caron,M. (1985):
Cretaceous planktic foraminifera.
In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 17–86

Van Eijden,A.J.M. and Smit,J. (1991):
Eastern Indian Ocean Cretaceous and Paleogene quantitative biostratigraphy.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 121 Eds: Weissel, J.Peirce, J.Taylor, E.Alt, J. p. 77-123
Anonymous: Unedited TaxonConcept data
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